Finding the Fourth Proportional to 105.14, 145.01 and 72.33

Step by Step Solution

1. Step 1: Write the proportion equation
   105.14 : 145.01 = 72.33 : x
2. Step 2: Convert to fraction form
   105.14/145.01 = 72.33/x
3. Step 3: Cross multiply
   105.14x = 145.01 × 72.33
4. Step 4: Simplify right side
   105.14x = 10,488.57
5. Step 5: Solve for x
   x = 10,488.57/105.14
6. Step 6: Final answer
   x = 99.76